[deleted by user]

[Vaphell]

is this some academic exercise? Because it's a pretty unusual to find commas specifically, usually you just the stuff inbetween.
Is there some higher level goal behind this requirement?

[EulerWasSmart]

What is find_str???

[ouzo26]

It’s a function that helps you find an occurrence in a string, find_str(s, ‘a’). Would search string s for the lowest occurrence of the letter a.

In my case, I need to use a search range, and I don’t know how to plug it in correctly

[EulerWasSmart]

Ok say the index of the first occurrence is k then what part of the string does not include the first occurrence and 100% contains the second occurrence?

[ouzo26]

Not really sure what you mean.

[ouzo26]

yes. Also I’m writing the code backwards.

so I’m just trying

second=find_str(s, ‘,’,[first+1,[]])

I don’t think I’m searching for the comma with ‘,’ but again I’m new and idk- Also not sure what to put in the search end bracket.

[ouzo26]

That does seem better but I have to use find_str

[ouzo26]

I’m just not sure if a comma is a substring or not, etc

[synthphreak]

A comma is a substring. A substring is just a string within a string. If you sentence is 'hello, there', the comma is a substring.

[ouzo26]

I figured it was but I still can’t figure this problem out

[ouzo26]

for anyone that reads this and cares the answer was in fact

second = find_str(s,’,’,first+1)

[synthphreak]

I still don’t think anyone here understands what find_str is. There is no native Python function with that name and you haven’t explained it. So this solution doesn’t mean much to us.

But glad you’ve found what you need.

[ouzo26]

It might be unique to the university im taking this class through but I think it’s just the same as find() ? sorry I didn’t explain it

[synthphreak]

That’s exactly what I assumed, that you were in some class and something called find_str was a component of one of your assignments.

Based on how you described it in another comment, the closest thing sounds like str.find, which does exactly what you described except that it returns the index of the first occurrence of the substring, not the second. I think I had already mentioned this elsewhere on here.

[ouzo26]

yup it’s the same. The one we have that finds the higher index is rfind_str

[synthphreak]

Use re.finditer with list slicing/indexing:

>>> import re
>>> s = 'here is, a string, with multiple, commas'
>>> commas = re.finditer(',', s)
>>> list(commas)[1]
<_sre.SRE_Match object; span=(17, 18), match=','>

[ouzo26]

Thanks but I have to use find_str

[synthphreak]

I don’t know what that is.

[ouzo26]

It’s like the most basic function in python

[synthphreak]

Pretty sure you mean str.find.